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External links
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* [https://web.archive.org/web/20180731120533/http://www.oag-helgoland.de/en/ Heligoland Bird Observatory] |
* [https://web.archive.org/web/20180731120533/http://www.oag-helgoland.de/en/ Heligoland Bird Observatory] |
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* [https://www.youtube.com/watch?v=5mc_QTuvTuw Footage of Destruction of Heligoland fortifications April 1947] |
* [https://www.youtube.com/watch?v=5mc_QTuvTuw Footage of Destruction of Heligoland fortifications April 1947] |
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* [https://www.faehren-helgoland.de/en/ Ferries to Heligoland] |
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{{Cities and towns in Pinneberg (district)}} |
{{Cities and towns in Pinneberg (district)}} |
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